Automobile lock



Patented July 17, 1923.

ALBERT C. HILL,

OF CHICAGO, ILLINOIS.

AUTOMOBILE LOCK.

Application filed November 25, 1921.

To all whom it may concern:

Be it known that I, ALBERT C. HILL, a citizen of the United States ofAmerica, and a resident of Chicago, county of Cook, and State ofIllinois, have invented certain new and useful Improvements inAutomobile Locks, of which the following is a specification.

My invention relates to automobile locks, and has for its object theconstruction of an improved device for that purpose.

In the accompanying drawings- Fig. 1 is a plan;

Fig. 2 is an elevation, partly in section;

Figs. 3 and 4t are elevations in the directions 8 and 4:, respectively,on Fig. 2;

Figsn5 and 6 are details.

In general appearance, the device is a block of metal composed of parts11 and 12 which are secured together and to the tube 13 which forms thestationary part of an automobile steering post. The parts 11 and 12 areput together temporarily, and then bored out to fit the post 13.

The part 12 has corners cut out as shown at 1 1 in Fig. 5,and the part11 has projecting fingers 15 which fit into the corners. Holes 16 aredrilled thru the adjacent fingers 15 and those portions of part 12 whichlie between these fingers. These holes are reamed out slightly taperedso that when hardened dowel pins 17 are driven into these holes fromopposite directions they cannot be withdrawn for the purpose of removingthe device from the post 13. In other words, it is intended that thedevice shall be connected permanently to the post 13, and removable onlyby metal cutting operations.

Before the parts are put together, the part 11 is counterbored from onthe post 13 and in a direction which is perpendicular to the directionof the bore for the post. This counterbore is in three steps which areof difierent diameter, and are eccentric to each other.

The deepest part of the counterbore, and the one which is of thesmallestdiameter, is bored thru the outer face of the part, but so as to leave alip 18. Pushed intothis bore from the inner direction is a pin lock 19which is secured against being rotated in its bore in any convenientmanner. The tumbler 20, of the lock 19, which contains the key hole 21,may be turned in the main body of the look by the turning of an insertedkey.

. responding groove in the 'cupied by a disk the side which fits- SerialNo. 517,45 5.

The intermediate step of the counterbore is occupied by a disk 22 havinga cam surface 23 on one face, and a projection 24 on the other face,which projection fits into a cortumbler 20 so that turning a key in thelock turns the disk 22. The disk 22 is secured to the tumbler by screws25. I

The largest step of the eounterbore isoc or plate 26 which is secured tothe part 11 by screws 27 one of which is shown in Fig. 1. Eccentricallyplaced on the disk 26 is a boss 27 which projects into the bore whichfits o-npost 13, and consequently into a hole in that ,post when thedevice is secured in place. The boss 27 is bored out, to receive aplunger 28 having a flange 29. Springs .80 located within the boss andacting upon the flange, serve. to push the plunger against the cam disk22. When the disk 22 is in the position shown in the drawings, theplunger or bolt 28 is pushed into a hole 31 in the movable part 32 ofthe steering post and serves to secure it to the stationary part 13.When the key is turned in the look so as to rotate the disk 22 to aposition which will bring the cut away part of cam 23 under the plunger28, the springs 30 act upon plunger 28 to withdraw it from the movablepost 32.

From the foregoing description it will be seen that the device islocated at a definite place on the steering post by the boss 27 enteringa hole in the stationary part of that post, and then is secured inposition by dowel pins driven into the device in such a way that theycan be removed only by a metal cutting operation. The term permanentlyconnected as herein used refers to a connection of this character.

The locking parts of sorted into a. solid block interior before thedevice is secured to the post, and when so secured these parts can bereached only by a key or by cutting away a considerable body of solidmetal. When the device is locked, it can be released only by the use ofa key or by operations which the device are in- ,aie difficult andnecessarily take a long time perform.

The key used with this form of lock can be removed only when the tumbler20 is in a certain position, and the cam is so connected to the tumblerthat the plunger 28 is in the hole 31 when the tumbler is in thisposition. In other words, a person cannot of metal from the I remove thekey from the device Without first locking the steering Wheel againstniove ment.

The plunger 28 is not pushed into locking position by springs, but by acam which rests upon the ledge in the solid metal of part 11. As aconsequence, the key cannot be removed until the plunger or bolt :28 isforced into locking position. If anything should prevent/the bolt 28from entering hole 31, that thing would also prevent the removal of thekey from the look. If anyone should insert an instrument into tube 32and attempt to release the look by push ing the bolt back, suchoperation Would be ineffective because the bolt is backed by the latface of a disk which rests npona solid ledge I What I claim is: I

1. In a device of the clam described, a block having; a face arranged toengage a steering post and said-face having a counterbore therein, alook, a cam and a cover plate located in said counterbore, said platehaving a boss'projecting into the post to which the device is connected,1 loeking'bolt supported in said plate, and means by which a keyinserted in said lock will operate said earn to move said bolt.

2. In a device of the class described, a block formed of two parts boredout in the line of the junction between the parts and one of said partsbeing counterbored from the interior in a direction perpendicular to thebore, a cam located in said counterbore and having its back bearingagainst the metal of the block at the bottom of the counter-bore, a.bolt supported With its end against the face of the earn, and means forturning said earn in its counterbore to force said bolt intolocki11g;position.

In a device of the class described, the combination with a steeringpost, of'a block formed of two parts bored out at the line of junctionbetween the parts and oneof'said parts being counterbored from theinterior in a direction perpendicular to the bore, aloclcandcamoperatedithereb-y located in the counter-bore and havingtheir axes :parallel with the axis of the counterbore, a {plate coveringthe caunandhaving a-boss projectinginto the postwto locate the devicethereon, and a bolt located insaid boss and-operated by said cam.

4. In a device of the class'described, the combination With a steeringpost, of a block arrai'igedto be secured to the post, a look and Caininserted thru an opening closed bythe post when the block is in place, aplate located in-the block between the canrand'the postrand having aprojection extending into the post to'deterinine the location of thedevice on the pest,and a bolt 'locatedin said projection and operatedbysaid-cam.

ALBERT C. HILL.

